[docbook-css] Licence Clarification

[martin.gautier@myrnham.co.uk]

>>'Public domain' specifically refers to things for which copyright has
been revoked, or has expired (i.e. some number of years after the
author's death, their copyright expires, and their work enters the
public domain, if it wasn't there already).

That makes sense.

>> Is it ok for me to publish a new version including this licence?

Sure. At the top of each file right?

Mart